CN209529821U - A kind of safe intravenous infusion needle and a kind of infusion apparatus - Google Patents

Abstract

A kind of safe intravenous infusion needle, including needle tubing, needle tubing seat, infusion tube, which is characterized in that be arranged a casing flexible outside needle tubing, cannula tip has coated needle tubing tip, and casing shoe is connected with casing seat, and casing seat is set in outside needle tubing；Casing seat is connected with casing seat handle, and casing seat handle a part can touch needle tubing seat because of compression；Elasticity part is equipped between casing seat and needle tubing seat；When needle tubing seat is fixed, and external force is applied to casing seat and drives it towards mobile close to the direction of needle tubing seat, and forces elasticity part deformation occurs, and needle tubing tip is exposed from cannula tip；The contact portion of casing seat handle is fixed by operator to needle tubing seating face, prevent elasticity part from restoring, after needle tubing tip enters vein, reducing can make casing seat be forced to the direction movement far from needle tubing seat because of the elastic recovering force that the release of the elastic potential energy of elasticity part generates the pressing force of casing seat handle, and soft cannula tip is finally made to have coated sharp needle tubing tip.

Description

A kind of safe intravenous infusion needle and a kind of infusion apparatus

Technical field

The utility model relates to a kind of safe intravenous infusion needle and a kind of infusion apparatuses, belong to the field of medical instrument technology.

Background technique

Venipuncture and related venous transfusion are a kind of the most commonly used general technology in clinical departments room, most-often used nothing The needle tubing of flexible sleeve is the common puncture needle of rigid material, and rigid needle tubing is when intravenous delay is shorter after puncturing successfully Between such as hours or so, during delay rigid needle tubing because including limb activity etc. reasons lead to the wind of syringe tip terminal spine perforating veins Danger exists always；If indwelling long period such as a few days or so or limbs of patient is needed to be difficult to fix, usually using the needle tubing of rigidity The remaining needle of the flexible casing of housing, rigid needle tubing tip is exposed, extracts the needle tubing of rigidity after puncturing successfully and makes flexibility Cannula intravenous, though the wind of vein is run through at the more complex needle tubing tip for essentially eliminating limb activity initiation of operation Danger；Certainly, the needle tubing of rigidity or casing flexible are extracted vein because of the external force surprisingly generated causes the situation of infusion failure not Range is solved in the present invention；It is above-mentioned that no matter which kind of mode is all inevitably in face of the challenge of individuation venipuncture procedure, institute It states individuation and refers to that skin thickness, skin hardness, vein degree of exposure, vein thickness, the vein depth, the wall of vein of patient are hard Degree, the distribution of vein bending degree, venous valve etc. differ widely.

In general, sterilizing point of puncture skin nearby when venipuncture procedure starts, the finger of subsequent proficiency is mainly that thumb is taut Tight another hand-held needle of skin and skin are in that sharp syringe tip terminal spine is first entered skin by a suitable angle, then break through vein Wall, the pin hole of needle tubing tip ramp enter that duct of Arantius is intracavitary, and blood is squeezed into needle tubing via the pin hole on inclined-plane by vein pressure, in needle tubing See that red blood flows on form or transparent needle tubing seat or transparent hose and is also referred to as blood back as the pin hole for judging inclined-plane Into the foundation of vein lumen；This blood back mode is the passive blood back of vein pressure dependence；However, many factors cause even if The pin hole on inclined-plane, which enters vein lumen, visible blood back can not also occurs, for example when vein pressure is very low, common circulating blood volume is not The shock patients of foot, thus the passive blood back mode of vein pressure dependence is extremely insensitive；For another example close to the inclined-plane of venous valve The unidirectional flow control effect of pin hole, venous valve makes blood difficultly flow into needle tubing；For another example pin hole inclined-plane be close to wall of vein make blood without Method enters needle tubing；Also as the inclined-plane of pin hole is located at vein knee；When there is the case where these have no blood back, operator usually recognizes Not yet enter vein lumen for pin hole, needle tubing can be pushed further into, so that vein tube wall enters the needle of vein lumen from side Easily from opposite side, vein tube wall is pierced by tip end, i.e., vein is run through by needle tubing, and venipuncture is caused to fail, seriously affect drug and The infusion of liquid, especially first aid medicine or blood cannot first time enter vein lumen will lead to patient it is dead rapidly or Irreversible organ failure.

Even if also needing to continue needle tubing to promote certain distance to intravenous, it is ensured that inclined-plane however, having seen blood back in puncturing Pin hole cmpletely enter duct of Arantius it is intracavitary, when vein move towards naked eyes can not judge when the step for needle tubing promote completely It is to implement in the state of blindness, easily causes vein to be run through when the tip direction of travel of needle tubing moves towards slightly different with vein Cause puncture failure, especially patient's vein to move towards not visible and when vein lumen is smaller safe inserting needle is almost extravagantly hoped.

Furthermore the clinical manipulation connected handle of transfusion needle needle tubing seat dominated by hand mostly, thumb in upper index finger under, in needle Index finger below tube socket inevitably touches the skin of the neighbouring point of puncture after just sterilizing, when there being micro- life on index finger Easily pollution point of puncture leads to pipeline related blood stream infections (CRBSI) when object, has a large amount of clinical literatures to report；And position when operating Index finger between skin and needle tubing seat also will affect between needle angle i.e. needle tubing and skin the selection of angle namely needle tubing with The selection of best angle between the vertical projecting line of needle tubing on the skin will receive the interference of index finger sandwiched therebetween, especially When selecting lesser best needle angle, puncture success rate is finally reduced, 01115577.9 stereo intravenous puncture needle of patent proposes The needle wing crossed a solution, but be significantly higher than skin will increase in infusion process causes needle tubing from intravenous by unexpected touching The risk of abjection.

When the needle tubing of non-remaining needle is in the intracavitary infusion of duct of Arantius, because of inevitable limb activity, the pin hole on inclined-plane is not Only being easy to be attached at wall of vein causes liquid infusion unsmooth, and the tip of needle tubing can also be because of needle tubing caused by limb activity and vein Relative displacement and through vein cause infusion stop, seriously affect the treatment of disease.

In short, there are following serious security problems for the transfusion needle of existing clinical use:

1. see blood back, the sharp tip of transfusion needle needle tubing leads to puncture failure through vein during continuation inserting needle.

2. the passive blood back mode of vein pressure dependence to force down when patient's vein or whens other correlation circumstances is difficult to see To blood back, this needle tubing tip for having entered vein lumen, which continues to promote, leads to puncture failure through wall of vein.

3. because the index finger being located at below needle tubing seat in operation inevitably touches the neighbouring puncture after just sterilizing The skin of point, when there being microorganism on index finger, easily pollution point of puncture leads to pipeline related blood stream infections (CRBSI).

4. the choosing that will affect angle between needle angle i.e. needle tubing and skin because being located at the index finger below needle tubing seat in operation It selects, reduces puncture success rate.

5. non-remaining needle its sharp needle tubing tip in infusion process is easy to because the factors such as limb activity are through vein.

Summary of the invention

The utility model to solve the above-mentioned problems, provides a kind of safe intravenous infusion needle.

Purpose of the utility model is realized as follows:

A kind of safe intravenous infusion needle, comprising: one for puncturing the needle tubing of skin and wall of vein；One is consolidated needle tubing The needle tubing seat of Ding Qinei；The infusion tube being connected to and being connected with needle tubing seat inner cavity with syringe intracavity；It is characterized in that, needle tubing It is arranged a casing flexible outside, cannula tip has coated sharp needle tubing tip, and the casing shoe close to needle tubing seat side is connected with The casing seat of inner hollow, casing seat are set in outside needle tubing, and inner hollow diameter is not less than needle tubing outer diameter；Casing seat is connected with one Divide the casing seat handle that may extend to needle tubing seat region, it is casing that casing seat handle a part can touch needle tubing seat because of compression Seat handle contact part；At least one is equipped between casing seat and needle tubing seat by the external force meeting elasticity part that deformation occurs；Work as needle Tube socket is fixed, and external force is applied to casing seat directly or indirectly through casing seat handle and drives it towards the side close to needle tubing seat To movement, and elasticity part connected to it is forced deformation occurs storage elastic potential energy, needle tubing tip is from coating its set tube top Expose at end；The contact portion that casing seat handle is located at needle tubing seat region is fixed by operator's finger to needle tubing seating face, is made Elasticity part cannot restore, and after needle tubing tip enters vein, reducing or release finger can make to cover to the pressing force of casing seat handle Tube socket is forced to the direction movement far from needle tubing seat because of the elastic recovering force that the release of the elastic potential energy of elasticity part generates, and most Soft cannula tip is set to have coated sharp needle tubing tip eventually；Elastic recovering force after elasticity part deformation is greater than table in casing Frictional force between face and needle tubing outer surface.

For the ease of holding, there are two casing seat handles, and two casing seat handle contacts extend partially into a left side for needle tubing seat It can be pressed to simultaneously needle tubing seating face by right two sides, two finger forces；Needle tubing seat has above and below and left and right side, and here is to make Used time contacts skin side.

The utility model component selected materials be medical material commonly used in the art, as casing can be used polyurethane (PU), Polyvinyl chloride (PVC) or corresponding thermoplastic elastomer (TPE) (TPE) etc. can be used in infusion tube.

Preferably, elasticity part is the compressed spring being set between casing seat and needle tubing seat；Alloy or non-gold can be used Belong to material production.

Further include limiting component to accurately manipulate, defines that axially opposing displacement is most between casing seat and needle tubing seat Big stroke；The limiting component, which can be independent pin member, can also be the portion that effect is matched on casing seat handle and needle tubing seat Point.

Further, on casing at least one in ring week region be with the socket of needle tubing outer surface sealing without make blood and/or Medical fluid outflow；The socket of the sealing refers to that the casing inner diameter of socket place no more than needle tubing outer diameter, does not have when in casing preferably The internal diameter of casing herein is less than needle tubing outer diameter when needle tubing, so the pressure to needle tubing appearance face ring week can be generated when being placed on outside needle tubing Power, so that it is guaranteed that the socket of sealing.

Preferably, it is provided at least one blood back peep hole being connected to syringe intracavity on needle tubing, is the first blood back peep hole； Casing is flexible and transparent, at least one area Huan Zhou on the casing between position corresponding with the first blood back peep hole and casing seat Domain is with the socket of needle tubing outer surface sealing without flowing out blood and/or medical fluid；The ring of described sleeve pipe and the sealing of needle tubing outer surface All regions refer in the state that needle tubing tip is wrapped by, this sealing socket ring week region still in the first blood back peep hole with Between needle tubing seat, it is ensured that the gap outflow of blood and/or medical fluid not between casing and needle tubing in vein V.

In order to generate active sensitive blood-return, needle tubing seat is equipped with a windowed regions, exposes and be set in windowed regions Infusion tube part, infusion tube part is between windowed regions top end face and windowed regions bottom face；Casing seat handle Position corresponding with windowed regions is equipped with pressing protrusion, and pressing protrusion can be pressed downward forcing the infusion tube in windowed regions Portion concave deformation.When vein pressure is lower or other in the case of, have no blood back and operator suspects that needle tubing tip has entered vein When, it gently loosens casing seat handle and to lift in pressing protrusion, the infusion tube part in windowed regions is from depressed deformation state It is restored because of natural resiliency, the negative-pressure ward effect of generation easily sees back the intraluminal blood sucking syringe intracavity of vein Blood can trust that starting operates in next step.

It is oppressed to more easily oppress the infusion tube part in windowed regions and release, casing seat handle and casing Seat between connection be the connection that can be rotated up and down, can casing seat almost not be disturbed on the basis of casing seat handle to connect Place is that axis does being rotated up and down away from or approaching needle tubing seat upper surface.Upwards when rotation, the pressing protrusion on casing seat handle can Get rid of windowed regions top end face limitation ot it；It is described to be rotated up and down, refer to that the free-end of casing seat handle contact part is separate The direction of needle tubing seat upper surface be it is upper, under the direction towards needle tubing seat upper surface is；Described sleeve pipe seat is not disturbed almost, is referred to When the finger that external force is usually operator, which acts on casing seat handle contact part, is rotated up and down it, this external force will not Related casing seat synchronous rotary.

Further a kind of simple preferred, the connection of casing seat handle contact part and casing seat is transverse area part The Weak link of wall thickness reduction, i.e. the first Weak link generate the effect of similar rotary shaft, the transverse direction by first Weak link Refer to the direction vertical with needle tubing central axes.

A kind of selection scheme is that limiting component is the limited post extended by needle tubing seat top end face, and it is corresponding to pass through casing seat The through hole of position, i.e. the first through hole, limit post head corresponding size are greater than the first through hole.

Further, limiting component is the limited post extended by needle tubing seat top end face, across casing seat opposite position First through hole, limit post head corresponding size are greater than the first through hole；Compressed spring is sheathed on outside limited post.

In order to ensure avoiding in infusion process because may be unexpected caused by the activity of limbs, casing seat or casing seat handle It is equipped between needle tubing seat and casing seat is prevented to return component to the mobile resistance in needle tubing seat direction, avoid sharp needle tubing tip because of limbs It is movable related and deviate from from soft cannula tip.

A kind of preferred embodiment is, casing seat handle bottom surface be equipped with top droop circle and the relatively sharp keen resistance in bottom return it is convex It rises, can be slided in the groove of needle tubing seating face or needle tubing seat corresponding site, when elasticity part actuating sleeve tube socket is to needle tubing tip It is mobile in place when, hinder go back to raised bottom and offsets with needle tubing seat top end face, prevention casing seat reply is displaced.

Another program is, the part that casing seat handle extends to needle tubing seat is equipped with through hole, i.e. the second through hole, described the It is cased with resistance movable up and down in two through holes to be sold back to a grain-producing area, needle tubing seat corresponding position is recessed at pin hole, when casing seat handle is in elastic force When under component driving to far from the movement of needle tubing seat direction in place, resistance is sold back to a grain-producing area and can be slid to pin hole, prevents casing seat and needle tubing seat Move to axial.

It further include the needle tubing seat handle being connected with needle tubing seat, needle tubing seat handle and casing in order to which operator preferably holds Seat handle can be touched simultaneously by two fingers of operator.

In order to avoid the interference that index finger or other fingers select best needle angle when puncturing, needle tubing seat handle is independent Component, independent needle tubing seat handle are the first needle tubing seat handle, and integral blade shape, bottom section is in inverted T shaped；Needle tubing seat upper surface is set The section for having mouthful handle big is in inverted T shaped embeded slot, and the size for being fitted into slot cross-section is greater than corresponding first needle tubing seat handle bottom Portion's cross-sectional dimension；Finger or so clamps the first needle tubing seat handle when operation, and finger does not contact having disappeared near point of puncture The skin of poison.

A kind of scheme is that needle tubing seat handle is integrally in foliaceous, is linked together in needle tubing seat upper surface and needle tubing seat, is vertical Straight type needle tubing seat handle, i.e. the second needle tubing seat handle, the connection between the second needle tubing seat handle and needle tubing seat upper surface can For the Weak link for relying on longitudinal rotating shaft or longitudinal region local wall thickness reduction, i.e. the second Weak link；Make the second needle tubing seat handle It opposite can be rotated left and right with needle tubing seat；The longitudinal direction refers to the same direction with needle tubing central axes；The left rotation and right rotation, refer to Needle tubing central axes are the left rotation and right rotation of rotary shaft.The second needle tubing seat rotatable handle to side adhesive tape can be consolidated after venipuncture success It is fixed, then carry out subsequent transfusion operation.

Another program is that needle tubing seat handle is foliaceous horizontal type needle tubing seat handle, is connected with needle tubing seat side；It is corresponding Casing seat handle be foliaceous horizontal type casing seat handle, horizontal type casing seat handle and needle tubing seat contact portion end have one Protrusion；Needle tubing seat corresponding site is equipped with a windowed regions, exposes the infusion tube part being set in windowed regions, is infused soft Tube portion is between windowed regions top end face and windowed regions bottom face；By horizontal type casing seat handle to needle tubing seat upper surface Pressing, pressing protrusion can be such that the infusion tube portion concave in windowed regions deforms.

Yet another aspect is that needle tubing seat handle is in foliaceous, and left and right two panels, right side needle tubing seat handle is third needle tubing seat hand Handle, left side needle tubing seat handle be the 4th needle tubing seat handle, the 4th and third needle tubing seat handle respectively with needle tubing seat left and right sides It is connected；Casing seat handle is that the thin-walled that extends to needle tubing seat upper surface is rod-shaped；Left and right two panels needle tubing seat is turned up in radial inflow when use Handle is sandwiched therebetween by casing seat handle, and firmly squeezing presses to the pressing protrusion of casing seat handle in needle tubing seat windowed regions Infusion tube part, is allowed to deformed depression.

A kind of application is infusion apparatus, including bottle stopper linker, drop pot, water only, liquid medicine filter, infusion tube and vein Transfusion needle, the intravenous infusion needle are above-mentioned all intravenous infusion needle schemes, the hose of infusion apparatus of infusion apparatus and the vein Transfusion needle is connected.

The beneficial effects of the utility model are:

1. see blood back, it is not required to exchange the operation bidirectionals such as finger, keeps finger home position that casing can be made to coat needle Sharp tip is managed, thoroughly eliminating the tip that needle tubing is sharp during continuing inserting needle leads to the risk of puncture failure through vein.

2. sensitive active aspiration-type blood back, can be accurate instead of the passive blood back mode of insensitive vein pressure dependence Timely judge whether the pin hole of needle tubing tip ramp enters vein lumen, avoids puncture failure caused by blindness inserting needle.

3. the contactless needle of holding of skin is avoided to the greatest extent because operator's finger surface microorganism pollution point of puncture is led The pipeline related blood stream infections (CRBSI) of cause.

4. the contactless needle of holding of skin completely avoids the influence selected by the index finger below needle tubing seat needle angle, from And further improve puncture success rate.

5. casing flexible has coated sharp needle tubing tip in infusion process, greatly reduce because of limb activity etc. The risk of vein is run through at needle tubing tip caused by factor.

Detailed description of the invention

The attached drawing for not limiting to the utility model is as follows:

Fig. 1: the puncture procedure schematic diagram of existing clinical vein transfusion needle；

Fig. 2A: the schematic diagram of wall of vein is broken through in the sharp tip of needle tubing；

Fig. 2 B: the schematic diagram of wall of vein is run through at the sharp tip of needle tubing；

Fig. 2 C: schematic diagram of the sharp tip of needle tubing close to venous valve；

Fig. 2 D: the pin hole enlarged diagram on the inclined-plane at the sharp tip of needle tubing；

Fig. 2 E: the pin hole on the inclined-plane at the sharp tip of needle tubing is close to the schematic diagram of wall of vein inner membrance；

Fig. 2 F: the sharp tip of needle tubing is located at the intraluminal schematic diagram of vein；

Fig. 3 A: the schematic perspective view of the utility model embodiment 1, needle tubing tip are exposed；

Fig. 3 B: the sectional perspective structural schematic diagram of the utility model embodiment 1, needle tubing tip sleeve cladding；

Fig. 4 A: the schematic perspective view of the utility model embodiment 2；

Fig. 4 B: the whole cutting structural schematic diagram of the utility model embodiment 2, spring are unfolded；

Fig. 4 C: the whole cutting structural schematic diagram of the utility model embodiment 2, spring-compressed；

Fig. 4 D: the use process status diagram of the utility model embodiment 2, two casing seat handles separate；

Fig. 5 A: the schematic perspective view of the utility model embodiment 3, the compression of arch elasticity part；

Fig. 5 B: the schematic perspective view of the utility model embodiment 3, arch elasticity part unfold, hinder and be sold back to a grain-producing area slide-in needle Pin hole on tube socket；

Fig. 6 A: the local cutting schematic perspective view of the utility model embodiment 4, in spring-compressed, windowed regions Infusion tube partial compression recess；

Fig. 6 B: the local cutting schematic perspective view of the utility model embodiment 4, the infusion tube portion in windowed regions Divide and restores；

Fig. 6 C: the local cutting schematic perspective view of the utility model embodiment 4, spring are unfolded；

Fig. 6 D: the local cutting schematic perspective view of the utility model embodiment 4, spring-compressed, the rotation of casing seat handle Shaft；

Fig. 7: the stereochemical structure and partial enlargement diagram of the utility model embodiment 5；

Fig. 8 A: the schematic perspective view of the utility model embodiment 6；

Fig. 8 B: the local cutting structural schematic diagram of the utility model embodiment 6；

Fig. 9 A: the schematic perspective view of the utility model embodiment 7；

Fig. 9 B: the amagnified partial perspective structural schematic diagram at the embeded slot radial opening of the utility model embodiment 7；

Fig. 9 C: the part the M partial enlargement diagram in Fig. 9 A of the utility model embodiment 7；

Fig. 9 D: the use process status diagram of the utility model embodiment 7, the first needle tubing seat handle are moved up from needle tubing seat Out；

Fig. 9 E: the use process status diagram of the utility model embodiment 7, needle tubing seat are fixed by tape-stripping；

Figure 10 A: the schematic perspective view of the utility model embodiment 8；

Figure 10 B: the use process status diagram of the utility model embodiment 8, needle tubing seat are fixed by tape-stripping；

Figure 11 A: the schematic perspective view of the utility model embodiment 9, spring are unfolded；

Figure 11 B: the use process status diagram of the utility model embodiment 9, spring-compressed；

Figure 11 C: the direction the E-E entirety cutting structural schematic diagram along Figure 11 B of the utility model embodiment 9；

Figure 12 A: the schematic perspective view of the utility model embodiment 10, spring-compressed；

Figure 12 B: the schematic perspective view of the utility model embodiment 10, spring are unfolded；

Figure 13: the schematic perspective view of the infusion apparatus entirety of the utility model embodiment 11.

In figure: S. skin surface；S1. subcutaneous tissue；S0. skin degerming region；T. thumb；F. index finger；V. vein；V0. Vein lumen；V1. side wall of vein；V2. opposite side wall of vein；Vv. venous valve；W1. the second blood back peep hole；W2. windowed regions； W3. the second windowed regions；L1. central axes；L2. vertical projecting line；L3. ring week region；J1. water stops；J2. it is infused adapter； P. Resistance is sold back to a grain-producing area；A. adhesive tape；1. intravenous infusion needle；11. needle tubing；110 syringe intracavities；111. needle tubing tip；112. pin hole；113. needle Pipe middle section；114. needle tubing bottom part；115 needle tubing outer surfaces；116. the first blood back peep hole；12. needle tubing seat；120. needle tubing seat Inner cavity；121. needle tubing seat top end face；1211 limited posts；The head that 1212. limited posts expand；122. needle tubing seat upper surface； 1221. embeded slot；1222. embeded slot top adjacent surfaces；1223. embeded slot bottom end adjacent surfaces；1224. embeded slot axially open； 1225. embeded slot radial opening；123. needle tubing seat lower end surface；124. needle tubing seat side；1241. the sheet wing；125. groove；126. Groove top face；127. selling hole；128. windowed regions top end face；1281. windowed regions bottom face；129. needle tubing seat bottom face； 13. infusion tube；130. infusion tube inner cavity；131. infusion tube part；14. casing；140. cannula cavity；141. sets of tube tops End；142. casing shoe；143. internal surface of casing；144. cannula tips opening；15. casing seat；150. inner hollow；151. Casing seat top end face；152. casing seat bottom faces；153. casing seat upper ends；154. casing seat sides；155. first through holes； 16. casing seat handle；16a. first set tube socket handle；16b. the second casing seat handle；16c. third casing seat handle；16d. Quadruplet pipe seat handle；The 5th casing seat handle of 16e.；161. casing seat handle medial surfaces；162. casing seat handle lateral surfaces； 163. first Weak links；164. rotary shaft；17. casing seat handle contact part；The first contact portion of 17a.；17b. second is contacted Part；17c. third contact portion；The 4th contact portion of 17d.；The 5th contact portion of 17e.；171. retention bead；172. limit Position protruding apex face；173. hinder back protrusion；174. hinder back raised adjacent surface；175. hinder go back to bump bottom ends face；176. second perforations Hole；177. contact portion inner surfaces；178. contact portion outer surfaces；1781. sheet is prominent；179. pressing protrusions；1791. pressing Belling plays front end face；18. elasticity part；18a. compressed spring；18b. arch elasticity part；19. needle tubing seat handle；19a. One needle tubing seat handle；19b. the second needle tubing seat handle；19c1. third needle tubing seat handle；The 4th needle tubing seat handle of 19c2.；191. First needle tubing seat handle base upper surface；192. first needle tubing seat handle base lower end surfaces；193. second Weak links；2. infusion Device；21. bottle stopper linker；22. dripping pot；23. liquid medicine filter.

Specific embodiment

Limitation the embodiments of the present invention are not as follows:

Illustrate existing intravenous infusion needle operating process first, as shown in Figure 1, the pipe of infusion adapter J2 and medical liquid container Road is connected, and medical fluid flows into infusion tube, and excluding air ooze medical fluid can from infusion pin hole, closes the water being clipped on infusion tube Only J1, after point of puncture skin S0 disinfection nearby, left hand taught skin, hand thumb T is in upper index finger F in lower holding needle tubing seat handle 19, opaque needle tubing 11 and skin surface S α inserting needle at an angle, the central axes L1 and needle tubing that angle [alpha] is needle tubing 11 are in skin On vertical projecting line L2 between angle, needle angle α it is correct selection decide to a certain extent puncture whether succeed, so And the index finger F between needle tubing seat 12 and skin surface S be not only easy the skin that has sterilized of pollution but also severe jamming this Kind of selection, when especially needing to select lesser needle angle, moreover, need to turn down at any time during inserting needle needle tubing namely reduce into For needle angle [alpha] to guarantee needle tubing tip 111 in the center of vein lumen V0, this improper position being clipped in the middle of index finger F is serious The operation for interfering this needle angle α that may reduce at any time, reduces puncture success rate；Inserting needle process is as shown in Figure 2 A, needle Tip end 111 punctures skin surface S and breaks through nearest side wall of vein V1 by subcutaneous tissue S1, at this time the part of pin hole 112 In vein lumen V0, intravenous pressure forces blood into needle tubing and infusion tube 13, in the transparent of needle tubing seat 12 or Red or kermesinus can be observed on translucent second blood back peep hole W1 and on transparent or semitransparent infusion tube 13 Blood back；It observes after blood back to ensure that pin hole 112 is fully located in vein lumen V0, needle tubing 11 need to be turned down namely reduce inserting needle Angle [alpha] continues a distance that inserting needle is usually several millimeters；In case of vein lumen V0 is relatively thin, vein is bent substantially, needle angle α Easily in this procedure failure when bad, operator is unskilled, there is the sharp tip of needle tubing 11 as shown in Figure 2 B 111 run through opposite side wall of vein V2, puncture utter failure；For another example when there is the sharp tip 111 of needle tubing 11 shown in Fig. 2 C close to quiet The situation of arteries and veins valve Vv, when pin hole 112 is attached on venous valve Vv, blood back is difficult to occur, and is 11 cutting edge of a knife or a sword of needle tubing there are also a kind of situation Though the tip 111 of benefit has penetrated, venous valve Vv does not penetrate vein but blood back will not occur, then needle tubing as shown in Figure 2 E 11 is sharp The pin hole 112 on the inclined-plane at tip 111 is close to the situation of wall of vein inner membrance, and the pin hole 112 on inclined-plane is amplified signal, these feelings by Fig. 2 D Condition operator usually judges pin hole 112 and not yet enters vein lumen V0, continues inserting needle until finally puncturing mistake through vein V It loses.

And when puncturing successfully, the sharp tip 111 of needle tubing 11 as shown in Figure 2 F is located at the intracavitary progress liquid infusion of duct of Arantius, The sharp tip 111 of the needle tubing 11 for not having casing 14 to protect can include the limb activity caused by cough, turn etc. because of a variety of causes And be subjected to displacement, easily there is situation shown in Fig. 2 B through vein V.

Embodiment 1:

As shown in Fig. 3 A, Fig. 3 B, the embodiment of the present invention 1 includes: one for puncturing in the having of skin and wall of vein The needle tubing 11 of empty inner cavity 110, usually selection metal material；One needle tubing 11 is fixed it is cylindric made of the medical resin in it The inner surface of hollow needle tubing seat 12, needle tubing seat inner cavity 120 firmly seals the outer surface for being socketed needle tubing bottom part 114； 13 outer surface of infusion tube made of medical resin makes it and firmly sealing Nian Jie with the surface of 12 inner cavity 120 of needle tubing seat Inner cavity 130 is connected to syringe intracavity 110；Needle tubing outer surface 115 is arranged casing 14 flexible made of a medical resin, such as schemes Cannula tip 141 shown in 3B has coated sharp needle tubing tip 111, and the casing shoe 142 close to 12 side of needle tubing seat is connected with interior Casing seat 15 made of the medical resin in portion hollow 150, partial outer face and 15 hollow space of casing seat of casing shoe 142 Surface is bonded as one, and first casing, which can also be put into the mold cavity for be used to form casing seat, makes two for casing seat injection molding Person is linked together；Casing seat 15 is set in outside needle tubing 11, and the diameter of inner hollow 150 is not less than needle tubing outer diameter；Casing seat 15 connects Some may extend to the casing seat handle 16 in 12 region of needle tubing seat, and casing seat handle 16 can be originally as casing seat 15 One part can also be independent component and casing seat 15 is linked together, and the casing seat handle of the present embodiment is first set tube socket hand Handle 16a, the first set tube socket handle 16a are originate from 15 upper surface of casing seat one to the extension in 12 direction of needle tubing seat Point, main body is in thin rod shape, and the contact portion in 12 region of needle tubing seat is the first contact portion 17a of casing seat handle, and described the One contact portion 17a roomy compared with main body is in the arc thin slice consistent with 12 top end surface shape of cylindrical needle tube socket, is convenient for hand Refer to the pressing operation for being mainly thumb T to it；First contact portion 17a can with needle tubing seat upper surface 122 there are small gap, It can be set to very close to each other but can slide on；Between casing seat bottom face 152 and needle tubing seat top end face 121 be equipped with one by External force can occur compressive deformation metal or nonmetallic materials made of compressed spring 18a, compressed spring 18a is set in casing seat On needle tubing middle section 113 between 15 and needle tubing seat 12；It is fixed when needle tubing seat 12 is held by the finger of proficiency, the finger of the other hand is pressed The top end face 151 of pressing sleeve tube socket makes it towards close to the movement of the direction of needle tubing seat 12, and casing 14 makes needle tubing by related synchronizing moving Tip 111 is exposed from the cladding of cannula tip 141, and the compressed spring 18a being clipped between casing seat 15 and needle tubing seat 12 is pressed Contracting storage elastic potential energy, state is as shown in Figure 3A, and the index finger F of proficiency is located at needle tubing seat lower end surface 123, thumb T general when use First contact portion 17a presses to and is in close contact needle tubing seat upper surface 122, and generating enough frictional force makes casing seat 15 will not It is mobile to 111 side of needle tubing tip due to the elastic recovering force of compressed spring；Expose such as from cannula tip 141 at needle tubing tip 111 State shown in Fig. 3 A sees the clamping dynamics moderately loosened after blood back between index finger F and thumb T, makes immediately to venipuncture Frictional force between one contact portion 17a and needle tubing seat upper surface 122 is less than the elastic recovering force of compressed spring 18a, is not required to exchange The operation bidirectionals such as finger keep finger home position that casing seat 15 can be made mobile to 111 side of needle tubing tip, cannula tip 141 have coated needle tubing tip 111, at this time increase index finger F and thumb T between clamping dynamics adjust needle angle α continue into Several millimeters of needle, this process for continuing inserting needle is carried out on the basis of needle tubing tip 111 is coated by cannula tip 141 flexible , opposite side wall of vein V2 as shown in Figure 2 B will not be pierced through, ensures the success punctured to the full extent；Also infusion is reduced simultaneously The risk of vein is run through at needle tubing tip 111 caused by any limb activity of period.

When the present embodiment is designed to the first contact portion 17a and needle tubing seat upper surface 122 is in close contact, without finger Intervention, compressed spring 18a by compressed elastic recovering force should be greater than the first contact portion 17a and needle tubing seat upper surface 122 it Between frictional force.

To reduce resistance when puncturing, it is designed to the central axes L1 towards needle tubing or casing at cannula tip opening 144 The taper of tightening, this shape are convenient for that cannula tip 141 and needle tubing tip 111 is made to be pierced into skin and vein together.

Because needle tubing 11 is sheathed in cannula cavity 140, preferably stayed between internal surface of casing 143 and needle tubing outer surface 115 There is gap, resistance is minimum when the two relatively moves, but both at least one ring week region L3 are the sockets of sealing without making blood And/or medical fluid is flowed out from gap between the two；The outflow refers to that a part of needle tubing 11 and casing 14 can expose during infusion In vitro, because vein lumen V0 has a positive pressure higher than atmospheric pressure, the gap of the two as do not sealed in ring week it is possible that because The presence of pressure difference flows out to blood and/or medical fluid in vitro from this gap；The socket of the sealing refers to ring week region L3 Sleeve portion inner surface 143 be at least it is looped be also possible to being in close contact with the position needle tubing outer surface 115 for ring-band shape, Casing i.e. at this has certain pressure inwardly wrapped up to needle tubing outer surface 115；It is described inwardly to refer to towards needle tubing or casing Central axes L1.

Embodiment 2:

As shown in Figure 4 A, the present embodiment casing seat handle 16 is to extend from casing seat side 154 unlike the first embodiment The casing seat handle of left and right two out i.e. the second casing seat handle 16b, the contact portion of the second casing seat handle are second Contact portion 17b, the second contact portion 17b are located at the side 124 of needle tubing seat；Shown in Fig. 4 B, two sides of needle tubing seat 124 are equipped with axially expanded groove 125, and the second contact portion 17b prominent a part into groove 125 is that retention bead 171 is made For limiting component, the sliding that retention bead 171 can be axial in groove 125 is until retention bead top end face 172 and groove top Face 126 offsets, to limit movement of the second casing seat handle 16b to 111 direction of needle tubing tip.

Because being provided with two the second casing seat handle 16b in left and right, thumb T and index finger F is respectively pressed against itself and needle tubing when use Two the second contact portion 17b of seat side 124 are allowed to carry out puncture procedure, needle tubing seat lower end with 12 synchronizing moving of needle tubing seat Face 123 can not contacted with skin degerming region S0 substantially, utmostly reduce point of puncture by the risk of finger pollution；Simultaneously Interference of the index finger F to correct selection needle angle α in embodiment 1 between needle tubing seat 12 and skin surface S is eliminated, is improved Puncture success rate.

Further, as shown in Figure 4 C, the second contact portion 17b of each of two second casing seat handle 16b it is prominent to Groove 125 further includes hindering back protrusion 173 in addition to retention bead 171, and hindering back protrusion 173 has an inclined protrusion that hinders back to abut Face 174 and one it is vertical it is outstanding hinder go back to bump bottom ends face 175, hindering back raised 173 can slide in groove 125, work as compressed spring When 18a state restoration keeps the second contact portion 17b mobile to 111 direction of needle tubing tip, groove top face 126 can not prevent to incline Raised adjacent surface 174 is returned in oblique resistance, hinders back protrusion 173 and skids off out of groove 125, finally vertically outstanding to hinder go back to bump bottom ends face 175 offset with needle tubing seat top end face 121, prevent casing seat 15 by far from 111 direction of needle tubing tip axial force when from It is mobile, namely prevent to have coated 14 reversion of casing at needle tubing tip 111, it is ensured that needle tubing tip 111 during infusion persistently by Cladding to cannula tip 141 reduces it because limb activity runs through the risk of vein V.

It is the first blood back peep hole 116 that the tube body upper wall of needle tubing 11, which opens up a through-hole, such as Fig. 4 A, is at least seen in the first blood back It examines the part of the casing 14 near hole 116 to visually observe to be transparent or semitransparent with convenient, usually entire casing is selected transparent Material formula；Because the first blood back peep hole 116 be opened on needle tubing 11 it is closer apart from vein lumen V0, in same vein pressure Under closer position be easier blood back occur, facilitate operator and promptly and accurately judge whether pin hole 112 has entered vein lumen V0；Casing 14 between position corresponding with the first blood back peep hole 116 of needle tubing 11 and casing seat top end face 151 is equipped with one In ring week region L3, internal surface of casing 143 is the contact sealed, the sealing with needle tubing outer surface 115 on this ring week region L3 Contact or the socket of sealing refer to that blood and/or medical fluid in infusion process medium sized vein lumen V0 cannot pass through from this region, wrap Both include the gapless contact for having pressure, the contact of gapless no pressure, even allowed for small gap because of blood and/or Medical fluid is several times or even dozens of times in the viscosity of water, and biggish surface tension can prevent blood and/or medical fluid logical from lesser gap It crosses.

When beginning to use, two casing seat handles are first separated as shown in Figure 4 D, and pressing casing seat top end face 151 immediately makes bullet Spring 18a compression, needle tubing tip 111 are exposed from cannula tip 141, and thumb T and index finger F are respectively pressed against the second casing seat handle 16b With two the second contact portion 17b of needle tubing seat side 124, it is allowed to carry out puncture procedure with 12 synchronizing moving of needle tubing seat.

Embodiment 3:

As shown in Figure 5A, dramatically different with previous embodiment, embodiment 3 is between casing seat 15 and needle tubing seat 12 Elasticity part 18 be arch elasticity part 18b, each one of left and right, after the axial compressive force from casing seat top end face 151 Arcuate main body deformation and energy storage outward；The casing seat handle extended from casing seat upper end 153 is third casing seat handle 16c, The contact portion of the third casing seat handle 16c is third contact portion 17c, and the third contact portion 17c is equipped with the Two through holes 176 are inside cased with resistance and are sold back to a grain-producing area P, and resistance is sold back to a grain-producing area P main body and is in the form of a column and can slide up and down in the second through hole 176；In needle Tube socket upper surface 122 is equipped with pin hole 127, and third contact portion 17c can be moved axially on needle tubing seat upper surface 122；Such as figure Shown in 5B, when the pin hole 127 on P face needle tubing seat upper surface 122 is sold back to a grain-producing area in the resistance for being set in the second through hole 176, P is sold back to a grain-producing area in resistance It can crash into or enter in pin hole 127 through pressing to prevent third casing seat handle 16c from backing towards movement.

Embodiment 4:

In order in puncture process, once the needle tubing tip 111 with pin hole 112 enter vein lumen V0 can first when Between see blood back, the present embodiment as shown in Fig. 6 A, Fig. 6 B, needle tubing seat upper surface be equipped with a local material missing windowed regions W2 is directly exposed between windowed regions top end face 128 and windowed regions bottom face 1281 positioned at needle tubing seat inner cavity 120 Infusion tube part 131 in windowed regions W2；The casing seat handle extended from casing seat upper end 153 is Quadruplet pipe seat hand It is the connection that can be rotated up and down, the upper backspin between handle 16d, the Quadruplet pipe seat handle 16d and the 4th contact portion 17d Turn under referring to and being close to needle tubing seat upper surface 122, it is separate then be upper；The structure being rotated up and down as shown in Figure 6A is the 4th The first Weak link 163 that lateral local wall thickness in casing seat handle 16d main body is reduced；Fig. 6 D then shows another kind can be upper and lower The structure of rotation, with what is be rotated up and down between Quadruplet pipe the seat handle 16d and the 4th contact portion 17d of the mediation of rotary shaft 164 Connection.

The inner surface 177 of the 4th contact portion 17d opposite direction needle tubing seat windowed regions W2 of Quadruplet pipe seat handle 16d extends A pressing protrusion 179 out, when compressed spring 18a is compressed when use, needle tubing tip 111 is exposed, and thumb T is from contact portion appearance When face 178 presses, the 4th contact portion 17d, which is rotated down with the first Weak link 163 for axis, makes 179 pushing of pressing protrusion that will open a window 131 indentation formation of infusion tube part in the W2 of region, by the medical fluid in the infusion tube part 131 of indentation formation from pin hole 112 outflow needle tubings 11, when pin hole 112 partly or entirely enters vein lumen V0 with puncture process, usual operator has prominent It is broken to feel, thumb T is artificially reduced at this time to the pressing dynamics of the 4th contact portion 17d, makes the infusion tube part 131 pressed It is restored as shown in Figure 6B because natural resiliency recuperability is all or part of from etat lacunaire, 131 state of infusion tube part is from quilt The space restoring the negative pressure suction force of generation and releasing is pressed actively to be attracted to blood in needle tubing out of vein lumen V0 The even infusion tube inner cavity 130 of chamber 110, is closely located to the first blood back peep hole 116, Neng Gou at needle tubing tip 111 in addition Find blood back in time at the first time, this is the sensitive blood-return of active；Further loosen thumb T immediately after seeing blood back, disappears completely Remove or partially remove the frictional force between pressing protrusion 179 and infusion tube part 131, the elastic recovering force of compressed spring 18a The axial movement of actuating sleeve tube socket 15 makes cannula tip 141 coat needle tubing tip 111, presses raised front end face 1791 at this time and opens Window region top end face 128 offsets as shown in Figure 6 C, and the position-limiting action of generation prevents casing 14 from continuing to separate needle tubing seat 12 Direction continues to move axially, and position-limiting action counteracts the casing seat 15 generated by the elastic recovery power drive of compressed spring 18a Movement speed and maloperation caused by over-travel.

Further, thumb T continues to compress several millimeters of inserting needle of the 4th contact portion 17d continuation, it is ensured that pin hole 112 is fully located at In vein lumen V0, this process very likely touches wall of vein V1 or V2, but since soft cannula tip 141 has coated cutting edge of a knife or a sword The needle tubing tip 111 of benefit, causes the risk of puncture failure to be completely eliminated or be preferably minimized through wall of vein V1 or V2.

Embodiment 5:

As shown in fig. 7, embodiment shows another position limiting structure, the axially extending bar out of needle tubing seat top end face 121 Shape limited post 1211, preferred cross-sections are circle；15 main body of casing seat, which is equipped with, runs through casing seat top end face 151 and casing seat bottom end First through hole 155 in face 152, limited post 1211 passes through the first through hole 155, across the limited post of the first through hole 155 1211 part is the head 1212 expanded, and described expand refers to that its outer diameter is greater than 155 internal diameter of the first through hole, works as elastic part The head 1212 that limited post expands when part 18a is in reset condition offsets with casing seat top end face 151, and it is further to limit it Axial movement to 111 direction of needle tubing tip.

Embodiment 6:

It as shown in Figure 8 A, is that the 18 compressed spring 18a of elasticity part of the present embodiment is sheathed on limit with the difference of embodiment 5 On column 1211, the compressed spring 18a for avoiding hard during being infused may be to the compression of skin surface；With in embodiment 4 The 4th contact portion 17d of the identical Quadruplet pipe seat handle 16d and windowed regions W2 of needle tubing seat；Further include and embodiment 4 In the identical component that hinders back hinder back raised 173；Shown in Fig. 8 B, for along the local cutting knot of the central axial cutting of limited post 1211 Structure schematic diagram.

Embodiment 7:

As shown in Figure 9 A, in order to thoroughly avoid finger clamp in puncture procedure from leading between needle tubing seat 12 and skin surface S The a variety of above-mentioned drawbacks caused, the invention also includes the needle tubing seat handle held convenient for finger, the present embodiment shows that one kind can be removed Main body be in foliated first needle tubing seat handle 19a, the bottom that the first needle tubing seat handle 19a is connect with needle tubing seat is fallen in section The strip of T-type, the first bottom needle tubing seat handle 19a are integrally embedded in the embeded slot 1221 of needle tubing seat upper surface 122, are fitted into For the hollow section of slot 1221 in corresponding inverted T shaped with the first needle tubing seat bottom section handle 19a, embeded slot 1221 has an axis To strip positioned at the embeded slot axially open 1224 of needle tubing seat upper surface 122 and the inverted T shaped of radial direction be located at needle tubing seat bottom The embeded slot radial opening 1225 of end face 129, the bottom of the first needle tubing seat handle 19a is from 1221 needle tubing seat bottom face of embeded slot 129 embeded slot radial opening 1225 is inserted in embeded slot 1221.

For the sensitive blood-return of active, the second windowed regions W3, clamping first are equipped on two sides 124 of needle tubing seat The finger of needle tubing seat handle 19a can directly oppress the infusion tube part 131 of exposure in the second windowed regions W3；In order to simultaneously energy Enough claddings of needle tubing tip 111 that carries out in time when seeing blood back avoid continuing through vein V in inserting needle, the present embodiment use with The identical second casing seat handle 16b of embodiment 2 oppresses infusion tube using the pressing protrusion 179 on the 4th contact portion 17b Part 131 generates negative pressure.

Fig. 9 B show the amagnified partial perspective structural schematic diagram at the embeded slot radial opening of Fig. 9 A.

Thumb T index finger F clamps the first needle tubing seat handle 19a and upper drawings power, as shown in Figure 9 C, the first needle tubing seat when operation Handle base lower end surface 192 is separated with embeded slot bottom end adjacent surface 1223 or active force reduces therebetween, the first needle tubing seat Handle base upper surface 191 and embeded slot top adjacent surface 1222 are in close contact, while finger is pressed to positioned at needle tubing seat side 124 The 4th contact portion 17b, by pressing protrusion 179 oppress infusion tube part 131 make its recess, then proceed with aforementioned Process.

After puncturing successfully, the first needle tubing seat handle 19a is extracted into removal from embeded slot 1221 as shown in fig. 9d.

For fixed pin tube socket 12 better in infusion process, the sheet wing 1241 is extended in needle tubing seat side 124, increases Contact area, conducive to being adhered fixed for adhesive tape A, such as Fig. 9 E.

Embodiment 8:

Solved the problems, such as with embodiment 7 it is similar, as shown in Figure 10 A, the second needle tubing seat hand with blood taking needle tube socket Weak link Handle 19b is located at needle tubing seat upper surface 122, and when puncture can play the role of in embodiment 7 handle 19a similarly, but after puncturing Adhesive tape A fixation state that its need to be made as shown in Figure 10 B, the second needle tubing seat handle 19b and the connection of needle tubing seat upper surface 122 are The connection that can be rotated left and right, the left rotation and right rotation refer to that using needle tubing central axes L1 be rotary shaft to needle tubing seat side 124 direction Rotation, the second needle tubing seat handle 19b that the present embodiment is shown is office with the connection type of 122 part of needle tubing seat upper surface The second Weak link 193 that portion's wall thickness is reduced, the second needle tubing seat handle 19b can swing to the one of needle tubing seat 12 after puncture Side and skin surface S contact and being adhered fixed by adhesive tape A.

Embodiment 9:

As shown in Figure 11 A, the present embodiment is unlike embodiment 4 and 8, and needle tubing seat side 124 sets that there are two foliaceous Handle 19c, third needle tubing seat handle 19c1 and the 4th needle tubing seat handle 19c2；The contact portion of 5th casing seat handle 16e is 5th contact portion 17e, the 5th contact portion 17e is located on needle tubing seat upper surface 122, on contact portion outer surface 178 There is an axial sheet prominent 1781, the biggish sheet of area prominent 1781 facilitates by the third needle tubing seat handle of centripetal folding 19c1 and the 4th needle tubing seat handle 19c2 clamping, the centripetal folding refer to that using needle tubing central axes L1 be axis towards on needle tubing seat The folding of end face 122.

As shown in Figure 11 B when operation, thumb T index finger F clamps third needle tubing seat handle 19c1 and the 4th needle tubing seat handle 19c2 is opposite firmly, is clamped the sheet prominent 1781 of the 5th contact portion 17e of position in the inner, can be with third needle tubing seat Handle 19c1 and the 4th needle tubing seat handle 19c2 synchronizing moving；Thumb T index finger F clamps third needle tubing seat handle 19c1 and the 4th Needle tubing seat handle 19c2 generates downward component and is applied to the 5th contact portion 17e, makes the pressing on contact portion inner surface 177 Protrusion 179 presses the infusion tube part 131 in windowed regions W2, and the opposing clamping forces for reducing thumb T and index finger F can make It is lifted in pressing protrusion 179 in windowed regions W2, triggers the infusion tube part 131 of recess during elastic recovery sensitive Blood back continues thereafter with and clamps third needle tubing seat handle 19c1 and the 4th needle tubing seat handle 19c2 and its 5th interior contact portion 17e completes the aforementioned process for continuing inserting needle.Figure 11 C show whole cutting structural schematic diagram of Figure 11 B along the direction E-E.

Implement 10:

As shown in Figure 12 A, Figure 12 B, third needle tubing seat handle 19c1, and the contact portion of the 6th casing seat handle 16f is 6th contact portion 17f, the 6th contact portion 17f are in foliaceous radially projecting to the right, convenient under thumb T when operation Press contacts, and index finger F is located at below third needle tubing seat handle 19c1；This design makes foliated two kinds of handles horizontal direction weight Folded to use, finger contact area meets greatly clinical certain amount nursing staff operating habit；Reduce thumb T and food in puncture process Refer to the clamping force between F, the pressing protrusion 179 in windowed regions W2 can be made to be lifted up, the infusion tube part 131 of indentation Recovery of shape triggers sensitive blood-return, continues thereafter with the handle for clamping and being overlapped up and down and completes the aforementioned process for continuing inserting needle.

Implement 11:

Such as Figure 13, a kind of infusion apparatus 2 is shown, including bottle stopper linker 21, drop pot 22, water stop J1, liquid medicine filter 23, defeated Liquid hose 13 and intravenous infusion needle 1 be with clinical existing infusion apparatus difference, the intravenous infusion needle 1 be aforementioned present invention and Intravenous infusion needle 1 described in embodiment, the hose of infusion apparatus 13 of infusion apparatus 2 are connected with the intravenous infusion needle 1；The present embodiment In water stop J1 and the water in Fig. 1 and stop J1 folder to close the function of infusion tube 13 consistent but have flow adjustment effect；When using non-soft Property when being not easy inwardly the medical liquid container (not shown) that deformation occurs, bottle stopper linker 21 need to be usually connected with just like Figure 13 Shown in collateral air inlet pipe.

Claims (20)

1. a kind of safe intravenous infusion needle, comprising: one for puncturing the needle tubing (11) of skin and wall of vein；One by needle tubing (11) the needle tubing seat (12) in it is fixed；The infusion being connected to and being connected with needle tubing seat inner cavity (120) with syringe intracavity (110) Hose (13)；It is characterized in that, being arranged a casing (14) flexible outside needle tubing (11), cannula tip (141) has coated sharp Needle tubing tip (111), the casing shoe (142) close to needle tubing seat (12) side are connected with the casing seat (15) of inner hollow (150), Casing seat (15) is set in needle tubing (11) outside, and inner hollow (150) diameter is not less than needle tubing outer diameter；Casing seat (15) is connected with one Divide the casing seat handle (16) that may extend to needle tubing seat (12) region, casing seat handle (16) a part can be touched because of compression Needle tubing seat (12) is casing seat handle contact part (17)；At least one is equipped between casing seat (15) and needle tubing seat (12) by outer The power meeting elasticity part (18) that deformation occurs；When needle tubing seat (12) is fixed, and external force is directly or indirectly through casing seat handle (16) being applied to casing seat (15) drives it to move towards close to the direction of needle tubing seat (12), and forces elastic part connected to it Part (18) deformation occurs storage elastic potential energy, needle tubing tip (111) from coat its cannula tip (141) expose；Operator's hand Refer to and be fixed the casing seat handle contact part (17) for being located at needle tubing seat (12) region to needle tubing seat (12) surface, makes elastic force Component (18) cannot restore, and after needle tubing tip (111) enter vein (V), reduce or release pressing of the finger to casing seat handle Power can be such that casing seat (15) is forced to because of the elastic recovering force that the release of the elastic potential energy of elasticity part (18) generates far from needle tubing The direction of seat (12) is mobile, and soft cannula tip (141) is finally made to have coated sharp needle tubing tip (111)；Elastic part Elastic recovering force after part (18) deformation is greater than the frictional force between casing (14) inner surface and needle tubing (11) outer surface.

2. a kind of safe intravenous infusion needle according to claim 1, which is characterized in that casing seat handle (16) has two A, two casing seat handle contact parts (17) extend to the left and right sides of needle tubing seat (12), and two finger forces can be same by it When press to needle tubing seat (12) surface.

3. a kind of safe intravenous infusion needle according to claim 1, which is characterized in that elasticity part (18) is to be set to Compressed spring between casing seat (15) and needle tubing seat (12).

4. a kind of safe intravenous infusion needle according to claim 1, which is characterized in that further include limiting component, limit The range of axially opposing displacement between casing seat (15) and needle tubing seat (12).

5. a kind of safe intravenous infusion needle according to claim 1, which is characterized in that at least one ring on casing (14) All regions (L3) are with the socket of needle tubing (11) outer surface sealing without flowing out blood and/or medical fluid.

6. a kind of safe intravenous infusion needle according to claim 1, which is characterized in that needle tubing is provided at least one on (11) A the first blood back peep hole (116) being connected to syringe intracavity (110)；Casing (14) is flexible and transparent, is seen with the first blood back Examining at least one ring week region (L3) on the casing (14) between the corresponding position in hole (116) and casing seat (15) is and needle tubing (11) socket of outer surface sealing is without flowing out blood and/or medical fluid.

7. a kind of safe intravenous infusion needle according to claim 1, which is characterized in that needle tubing seat (12) is equipped with a windowing Region (W2), exposes the infusion tube part (131) being set in windowed regions (W2), and infusion tube part (131) are located at Between windowed regions top end face (128) and windowed regions bottom face (1281)；Casing seat handle (16) and windowed regions (W2) phase Corresponding position, which is equipped with, presses raised (179), and pressing raised (179) can be pressed downward forcing the infusion in windowed regions (W2) soft Tube portion (131) depressed deformation.

8. a kind of safe intravenous infusion needle according to claim 7, which is characterized in that casing seat handle (16) and casing Seat (15) between connection be the connection that can be rotated up and down, can casing seat (15) almost not be disturbed on the basis of casing seat hand Handle (16) does being rotated up and down away from or approaching needle tubing seat upper surface (122) by axis of junction；Upwards when rotation, casing seat hand Pressing raised (179) on handle (16) can get rid of windowed regions top end face (128) limitation ot it.

9. a kind of safe intravenous infusion needle according to claim 8, which is characterized in that casing seat handle contact part (17) the first Weak link (163) reduced with the connection of casing seat (15) for transverse area local wall thickness.

10. a kind of safe intravenous infusion needle according to claim 4, which is characterized in that limiting component is by needle tubing seat The limited post (1211) that top end face (121) extends passes through first through hole (155) of casing seat (15) opposite position, limit Post head (1212) corresponding size is greater than the first through hole (155).

11. a kind of safe intravenous infusion needle according to claim 4, which is characterized in that limiting component is by needle tubing seat The limited post (1211) that top end face (121) extends passes through first through hole (155) of casing seat (15) opposite position, limit Post head (1212) corresponding size is greater than the first through hole (155)；Compressed spring (18a) is sheathed on limited post (1211) outside.

12. a kind of safe intravenous infusion needle according to claim 1, which is characterized in that casing seat (15) or casing seat It is equipped between handle (16) and needle tubing seat (12) and casing seat is prevented to return component to the mobile resistance in needle tubing seat (12) direction, avoided sharp Needle tubing tip (111) deviate from from soft cannula tip (141).

13. a kind of safe intravenous infusion needle according to claim 12, which is characterized in that casing seat handle (16) bottom surface Equipped with top droop circle, raised (173) are gone back in the relatively sharp keen resistance in bottom, can be in needle tubing seat (12) surface or needle tubing seat (12) Sliding in the groove (125) of corresponding site, when elasticity part (18) actuating sleeve tube socket (15) is mobile in place to needle tubing tip (111) When, the vertical bump bottom ends face (175) outstanding that hinders back offsets with needle tubing seat top end face (121), and casing seat (15) is prevented to reply position It moves.

14. a kind of safe intravenous infusion needle according to claim 12, which is characterized in that casing seat handle (16) extends The second through hole (176) are equipped with to the part of needle tubing seat (12), resistance movable up and down is cased in the second through hole (176) and is sold back to a grain-producing area (P), needle tubing seat (12) corresponding position recess is at pin hole (127), when casing seat handle (16) under elasticity part (18) driving to When far from the movement of needle tubing seat (12) direction in place, resistance is sold back to a grain-producing area (P) and can be slid in pin hole (127), prevents casing seat (15) and needle Tube socket (12) move to axial.

15. a kind of safe intravenous infusion needle according to claim 1, which is characterized in that further include and needle tubing seat (12) Connected needle tubing seat handle, needle tubing seat handle can be touched simultaneously with casing seat handle (16) by two fingers of operator.

16. a kind of safe intravenous infusion needle according to claim 15, which is characterized in that needle tubing seat handle is independent part Part, the first needle tubing seat handle (19a), integral blade shape, bottom section is in inverted T shaped；Needle tubing seat upper surface (122) is equipped with mouth handle Big section is in inverted T shaped embeded slot (1221), and the size in embeded slot (1221) section is greater than corresponding first needle tubing seat hand Accumulate size in the handle bottom section (19a).

17. a kind of safe intravenous infusion needle according to claim 15, which is characterized in that needle tubing seat handle is integrally in leaf Sheet is linked together in needle tubing seat upper surface (122) and needle tubing seat (12), is the second needle tubing seat handle (19b), the second needle tubing seat Connection between handle (19b) and needle tubing seat upper surface (122) be include relying on longitudinal rotating shaft or longitudinal region local wall thickness The second Weak link (193) reduced；Rotate left and right the second needle tubing seat handle (19b) opposite can with needle tubing seat (12).

18. a kind of safe intravenous infusion needle according to claim 15, which is characterized in that needle tubing seat handle is foliaceous Horizontal type needle tubing seat handle, is connected with needle tubing seat side (124)；Corresponding casing seat handle (16) is the horizontal jacket of foliaceous Tube socket handle (16), horizontal type casing seat handle (16) and needle tubing seat (12) contact portion end have a pressing raised (179)；Needle Tube socket (12) corresponding site is equipped with a windowed regions (W2), exposes the infusion tube part being set in windowed regions (W2) (131), infusion tube part (131) are located between windowed regions top end face (128) and windowed regions bottom face (1281)；By water Flat pattern casing seat handle (16) is pressed to needle tubing seat upper surface (122), and pressing raised (179) can make in windowed regions (W2) Infusion tube part (131) depressed deformation.

19. a kind of safe intravenous infusion needle according to claim 15, which is characterized in that needle tubing seat handle is in blade Shape, the 4th needle tubing seat handle (19c2) and third needle tubing seat handle (19c1) two panels, respectively with needle tubing seat (12) left and right sides It is connected；Casing seat handle (16) is that the thin-walled that extends to needle tubing seat upper surface (122) is rod-shaped；Left and right two is turned up in radial inflow when use Piece needle tubing seat handle is sandwiched therebetween by casing seat handle (16), and firmly squeezing makes the pressing protrusion of casing seat handle (16) press to needle Infusion tube part (131) in tube socket (12) windowed regions (W2), is allowed to deformed depression.

20. a kind of infusion apparatus, including only (J2), liquid medicine filter (23), infusion are soft for bottle stopper linker (21), drop pot (22), water Manage (13) and intravenous infusion needle (1), which is characterized in that the intravenous infusion needle is intravenous infusion needle described in claim 1-19 (1), the hose of infusion apparatus of infusion apparatus is connected with the intravenous infusion needle (1).